Black-bellied Antwren vs Rusty-backed Antwren

In short

The Black-bellied Antwren and Rusty-backed Antwren can be distinguished by plumage and habitat preferences. Males of the Black-bellied Antwren are darker with less obvious white flanks, while the Rusty-backed Antwren is more rufescent above. Females of the Black-bellied Antwren have a broad white supercilium and paler underparts, contrasting with the Rusty-backed Antwren's white streaked with black underparts.

Identification tips

1. Male plumage: Look for darker upperparts in Black-bellied Antwren males compared to the more rufescent Rusty-backed Antwren. 2. Female plumage: Identify Black-bellied Antwren females by their broad white supercilium and paler underparts. 3. Habitat: Note the habitat; Black-bellied Antwrens prefer taller caatinga and woodland, while Rusty-backed Antwrens are found in open cerrado habitats.

Plumage

Male Black-bellied Antwrens are darker with less obvious white flanks compared to the Rusty-backed Antwren, which is more rufescent above. Female Black-bellied Antwrens have a broad white supercilium and paler underparts, while female Rusty-backed Antwrens are white streaked with black below.

Behaviour

Both species forage actively for arthropods and can be difficult to spot as they stay in the undergrowth.

Habitat

Black-bellied Antwrens are typically found in taller caatinga, tropical deciduous woodland, or second growth at the ecotone between caatinga and cerrado. Rusty-backed Antwrens occur broadly across cerrado and other open habitats in central Brazil, with isolated populations in savanna patches in eastern Amazonia and Andean foothills in Peru.